Paper trimmer



Dec. 7,1926. 1,609,619

C. E. GALVIN PAPER TRIMMER Filed Sept. 4, 1924 3 Sheets-Sheet 1 8nucul'oz 35 Whmvo Dec. 7 1926. 1,609,619

c. E. GALVIN PAPER TRIMMER Filed Sept. 4, 1924 3 Sheets-Sheet 2 SmucnfozDec. 7-, 1;,1(g. 1,609,619

C. E. GALa/IN PAPER TRIFIMER Filed Sept. 4, 1924 3 SheetsSheet S .az a JW 6 32 -34 Patented Dec. 7, 1926. f

UNITED STATES PATENT OFFICE.

CHARLES E. GALVIN, F SPRINGFIELD, OHIO, ASSIGNOR- TO THE BIDS-ELYTRIMMER COMPANY, OF SPRINGFIELD, OI-Il'O, A COBEOEATZON OF OHIO.

PAPER TRIMMER.

Application filed September 4, 1924.

My invention relates to paper trimmers of the kind which are moreparticularly adapted for trimming wall paper and the like.

In paper trimmers of this type now in general use there is employed asingle cutting disk carried by a pivoted spring-pressed head mountedupon a support which slides along the straight edge, it being necessaryfor the operator to press the cutting disk against the paper as the toolis slid along the straight edge, the operator holding the straight edgein position with one hand while operating the tool with the other hand.It has been customary to place a strip of zinc along the edge of thetable beneath the tool to protect the table from the action of thecutter.

One of the objects of my invention is to provide a paper trimming toolwhich requires no pressure upon the part of the operator to perform thecutting operation.

A further object of the invention is to provide an arrangement wherebythe paper during the cutting operation is pressed against the straightedge instead of against the table which obviates the necessity ofproviding the table with a protecting strip of zinc or other material.

A further object of the invention is to provide an arrangement wherebythe paper can be trimmed in a perfectly straight line without anyparticular skill upon the part of the operator.

With the tools now on the market it is impossible to cut a very narrowstrip from the paper because of the wrinkling of the paper, and afurther object of my invention is to provide arrangements by which anarrow strip may be readily cut from the pa per unhampered by anywrinkling of the paper or other conditions which make this impracticalwith the old form of tool.

A further object of my invention is to provide a device for trimmingpaper which will be simple in construction, economical in manufacture,effective in its operation, and easily manipulated without the necessityof any particular skill upon the 'part of the operator.

In the accompanying drawings:

Fig. 1 is a front elevation of a cutting tool embodying theimprovements.

Fig. 2 is a rear elevation of the same.

Fig. 3 is a top plan view of the same.

Serial No. 735.783.

Fig. 4; is an end view of the tool showing in section the straight edgeand a portion of the table used in conjunction therewith.

Fig. 5 is a section on the line 5.5 of Fig. 2.

Fig. 6 is a top plan view partly broken away of the table and straightedge.

Fig. 7 is an end View of the table and straight edge.

Fig. 8 is an enlarged detail View of one set of the devices forconnecting the straight edge to the ends of the table.

Fig. 9 isan end View of the same.

Referring to the drawings, 1 represents a casting which forms themainbody or' support of my improved tool. The rear portion of the upper edgeof this body is depressed, as indicated at 2, and has an upturnedprojection 3 to form a convenient thumb rest for the operator. Theforward portion of the body is provided with an annular recess 1} and alaterally projecting boss 5, concentric to the recess. The boss is boredto provide a bearing for an arbor 6 of a cutting disk 7, the disk andarbor being secured together by a screw 8 which projects through anopening in the disk and is threaded in the arbor as shown in Fig. 5. Theouter end of the boss is threaded to receive a threaded plug 9 andbetween the plug and the end of the arbor is a coiled spring 18, whichacts as a thrust member for the arbor. The disk 7 projects slightlybelow the lower end of the body 1 and the cutting edge of this disk ispreferably bevelled as indicated at 7' in Fig. 5.

Projecting from the rear portion of the lower edge of the main body 1 isan integral extension 10 and pivoted to this extension 10 by the pivotscrew 11 is a lever 12. The long arm of this lever projects forwardlyand at its forward end has a laterally extending integrally-formed boss13 which is provided with a bore to provide a bearing for an arbor 14:.The arbor is interiorly threaded to receive a screw 15 which rigidlyconnects to the arbor a cutting disk 16 which is preferably providedwith a flat periphery 16. The outer end of the boss 13 is threaded toreceive a plug 17 which constitutes a thrust member which can beadjusted to properly position the cutting disk. The rear end of thelever 12 has rigidly connected there with an upwardly projecting arm 19which has secured thereto a wear disk 20. Between this disi: E20 and themain body 1 is inserted a coil spring 21, the forward end of the springbeing located in a small chamber or recess in the body 1 indicated at 22in Fig. l.

Secured to the rear side of the body 1 is a gauge strip 23, this stripbeing fastened to a serie of three posts, one of which is shown indotted lines in Fig. 5 and indicated by 24;, with rollers on the posts.The under edge of the gauge strip has a series of integral lips 26extending laterally toward the forward side of the tool. The straightedge, indicated at 27. has a longitudinallyextending groove 28 on itsupper surface and a metallic plate 29 which partially overhangs thegroove.

Referring to Figs. 6, T, 8 and 9. the straight edge in the present caseis shown pivotally connected at each end to the table 31. Each end ofthe straight edge has clamped thereto the horizontal portion 82 of anangle-shaped plate, the vert cal portion 33 of which is attached to anarm ill which is pivoted at to a plate 36 which projects forwardly fromthe table. The plate 36 is firmly secured to the ends of the table andfor the purpose each end of the table has a reinforcing plate 37 securedthereto in any suitable way, which plate 3? has a pair 0t threaded studs38 rigidly secured thereto, the studs projecting through openings in theplate 36 and receiving nuts 39 by which the plate 36 may be rigidlyclamped in position. Each of the horizontal portions of the angle plateis secured to the corresponding end of the straight edge by providingthe straight edge with a threaded stud d0 passing through a slottedopening 41 in the plate and receiving wing nut 42 (Fig. 4). In thefolded position of the arms 34 the straight edge will lie upon thetorward edge of the table but slightly over hanging it as shown. lVhenit is desired to place the paper to be out upon the table the straightedge is swung to the dotted line position of Fi 7. The vertical portionof each angle plate is so connected to the corresponding arm 34- as topermit the straight edge to he raised slightlv from the table so as toadjust the position of the paper beneath the straight edge when desiredand to that end the portion of the angle plate is provided with aplurality of slotted openings 43 to receive screws at which are threadedin the arm For transportation purposes the wing nuts 42 and the nuts 39are removed so as to perinit the parts to be disconnected.

The inner side of the bodv l of the tool adjacent the lower part of therecessed portion thereof is provided *ith flat faces 1.

In operation the tool is placed upon the straight edge by inserting thelips 26 be neath the overhanging portion of the plate 29 with the faces1 of the body ot' the tool closely adjacent the forward side of the strait edge, with the cutting disk 16 hearing with a yielding pressureagainst the under side of the straight edge as shown in T13. l. Thecuttingdish T is pres ed with lding pressure against the cutting disk 16and the tin: st member 17 of the cutting disk lli so adjusted as tobring the cutting point of the two disks slightly beyond the forwardedge oi the straight edge as sh' iivn in Figs. l and The paper havingbeen laid upon the table and the straight edge adjusted thereto same isclamped between the underside of the straight edge and the periphery ofthe cutting dish 16 during the shearing operation which is accomplishedby sliding the tool along the straight edge.

It will he noticed that the top ill of the table overhangs thesupporting part 2-36 thereof so as to :wcoiniuodate the boss 13 and whenit is desired to remove the straight. edge from the top of the table topermit the insertion ot a new piece of paper or otherwise the tool slidto either one of the ends of the top ill. ot the table which recc. rd asindicated at 31 so that the straight edge and tool may be tilted in themanner hct'ore indicated lly this construction it will be seen that wallpaper or other paper or material of that character may readily betrinin'ied without the exercise of any particular skill upon the part ofthe operator. The operator after the paper has been placed upon thetable and the straight edge swung to position on the table merelystraightens the paper so as to cause the forward side ot the straightedge to lie substantially along the desired line of cut after which theoperator merely pushes the tool along the straight edge. lly reason ofthe fact that the straight edge is in fixed parallel position relativelyto the table and that the paper will he firmly held between the straightedge and cutting disk 16 a straight cut is insured without any attentionupon the part of the operator as it is impossible for the straight edgeto move from the line of cut as would he the case where the straightedge is held in position by one hand of the operator while operating thetool. with the other hand. Furthen no down, pressure is required uponthe tool, thus making the trimininn; operation less laborious upon thepart oi the operator and it is also possible to remove from the paper avery narrow cut when desired for the reason that the paper is firmlyheld upon the straight edge by one of the cutters at the immediate pointwhere the cutting operation takes place so that there will be nointerference by wrinkles in the paper or otherwise with the trimmingoperation. By means of the threaded plug 17 the cutting disk 16 may beadjusted to bring its cutting edge in proper relation to the forwardedge of the straight edge, while the spring 18 presses the disk 7 firmlyagainst the disk 16 and compensates for any wear between the disks. Therollers constitute anti-friction devices which roll along the uppersurface of the straight edge and assist in the easy operation of thetool.

Having thus described my invention, I claim:

1. In a paper trimmer, a main support, a

cutting disk carried by said support, a spring-pressed arm pivoted tosaid support, and a second cutting disk carried by said arm andcooperating with said first disk.

2,111 a paper trimmer, a main support, a cutting disk carried by saidsupport, a lever pivoted to said support, a cutting disk carried by oneend of said lever with its cutting edge overlapping the cutting edge ofthe first mentioned disk, an arm projecting from the other end of saidlever, and a spring between said arm and support- 3. In a paper trimmer,a main support, a cutting disk carried by said support, means foraxially adjusting said disk, a springpressed auxiliary support pivotallyconnected with said main support, a second cutting disk carried by saidauxiliary support and partly overlapping said first disk, and a springassociated with one of said disks for holding the overlapping parts ofsaid disks in yielding contact one with the other.

4. In a paper trimmer, the combination, with a straight edge, of a toolhaving a main support, interengaging devices between said tool andstraight edge, a pair of cooperating cutting disks carried by saidsupport in partly overlapping relation, one of said disks being arrangedat a side edge of said straight edge, and means for holding the otherdisk in yielding engagement with the under portion of said straightedge.

5. In a paper trimmer, the combination, with a straight edge, of a toolhaving a main support, interengaging devices between said support andstraight edge, a spring pressed auxiliary support pivoted to said mainsupport, and cooperating cutting disks carried by said main support andsaid auxiliary sup port in partial overlapping relation, the diskmounted on said main support being arranged at a side edge of saidstraight edge and the disk mounted on said auxiliary support having itsperiphery in yielding engagement with the under portion of said straighted e.

g The combination of a table, a straight edge pivotally connected withsaid table, and a cutting tool slidably mounted on said straight edge,comprising a pair of cooperating cutting disks, one of which lies inclose proximity to the outer edge of said straight edge and the other ofwhich has its periphery in yielding contact with the under side of saidstraight edge.

7. In a paper trimmer a main support, a straight edge radially mountedon fixed pivots having a portion thereof projecting beyond the mainsupport, a plurality of cutting disks slidingly mounted on said straightedge, one cutting disk having its cutting edge bearing against the lowersurface of the paper in close proximity to the bottom surface of thestraight edge, and the other disk having its cutting edge bearingagainst the upper surface of said paper.

8. In a paper trimmer a main support, a

straight edge having a portion extending beyond the support, a toolslidingly mounted on said straight edge, a pair of upper and lower diskson said tool, the edge of one disk bearing against the lower surface ofthe paper and the edge of the other disk bearing againstthe uppersurface of said paper, said tool and disks being capable of having asliding action independent of any pressure exerted downwardly upon thedisks, thereby cutting said paper with a minimum of friction. 9. In apaper trimmer the combination with a fixed supporting surface of aremovable straight edge having a portion thereof projecting beyond thefixed surface, the paper also projecting beyond the straight edge, twoco-acting cutting disks located at a point in proximity to theprojecting edge of the straight edge, one disk having its cutting edgebearing against the lower surface of the paper near the bottom of thestraight edge and the other disk having its edge bearing against theupper surface of the paper near the forward edge of the straight edge,said disks being capable of having a sliding action along the straightedge without pressure being exerted downwardly upon the cutting disks.

In testimony whereof, I have hereunto set my hand this 26 day of August1924.

CHARLES E. GALVIN;

